Just because the album cover and title are out doesn't mean the project is completely finished!
"We're in the middle of it right now," says Luke. "It's a little bit fluid right now. I can't even say at this stage what songs for sure are making it and what songs aren't. We're working with a lot of producers and overseeing it with her A&R and record label and management and trying to make something cohesive."
The Doctor reveals the album features songwriter Bonnie McKee, (Katy Perry's "California Gurls" and Taio Cruz' "Dynamite"), and producers Bloodshy ("Toxic," "Showdown," "Radar") and Benny Blanco (Ke$ha's "Tik Tok" and Perry's "California Gurls").
Britney's success with first single Hold It Against Me has exceeded industry expectations, but the song wasn't always Britney's. "We might have played it for her, but it definitely wasn't a Katy Perry record," Luke said. "We had it for a while. I wanted to make sure it didn't sound like everything else I've done. I brought it into Billboard, and he just killed it. It can be hard in the verse, and the bridge is super, super hard, but the chorus is super-pop. You can play that chorus acoustically on a guitar and it's still going to sound great."
Britney's been in and out of the studio the last two years laying tracks down for the much anticipated release, which is expected to debut at number one with 500,000 copies in its first week.
"Britney's really fast," Dr. Luke says. "She gets it done."